外激励作用下亚音速二维壁板的复杂响应研究

研究了亚音速流中二维壁板在外激励作用下的复杂响应问题。采用迦辽金方法将非线性运动控制方程离散为常微分方程组，采用数值方法进行计算，研究了壁板系统的复杂响应。应用最大李亚普诺夫指数和庞加莱截面方法对系统的运动性质进行了判定。结果表明，系统随着参数的变化呈现出复杂的响应，系统的周期运动与混沌运动会相间出现；系统由周期运动进...

Complicated response analysis of two-dimensional thin panel in subsonic flow with external excitation

The complicated response of two-dimensional thin panels in subsonic flow with external excitation is studied in this paper. The nonlinear governing motion equation is reduced to a series of ordinary differential equations using the Galerkin method. The Runge-Kutta numeric method is used to conduct the numerical simulations. Maximum Lyapunov exponents and Poincaré map are used to judge the motion quality. The results show that with the change of parameters, the system appears complicated response, the periodic windows and chaos occur alternately; the route to chaos is via doubling-period bifurcation but the route from chaos to periodic motion is intermittent.